Adjustable jack or shore



c. M. MARKHAM.

ADJUSTABLE JACK 0R SHOE.

. APPLICATION FILED MAY-1, 1.918- 1,349,576 I Patented Aug. 17, 1920.

4 SHEETS-SHEET I.

"gum 2 7 @Wss C. M- MARKHAM.

ADJUSTABLE JACK 0R SHOE.

APPLICATION FILED MIYI, 19m.

EVE- x I C. M. MARKHAM.

ADJUSTABLE JACK 0R SHOE.

APPLICATION FILED MAY 1. 1918.

1,349,576. ate ted Aug. 17, 1920.

4 SHEETS-SHEET 3.

17 627672307? Zdzfiess 77777/"/M C. M. MARKHAM.

ADJUSTABLE JACK 0R SHOE.

APPLICATION FILED MAYI. 1913.

1,349,576. Patented'Aug. 17, 1920.

CHARLESM. MARKHAM, OF MILWAUKEE, WISCONSIN.

ADJUSTABLE JACK OR SHORE.

Specification of Letters Patent.

Patented Au. 1'7, 1920.

Application filed May 1, 1918. Serial No. 231,832.

To all "whom it may concern:

Be it known that 1, CHARLES M. NLARK- HAM, a citizen of the UnitedStates, residing at lvlilwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements in anAdjustable Jack or Shore, of which the following is a description.

My invention relates to that class oi devices employed for raising,supporting or holding in place portable objects, structures or the like,such as parts of buildings, e1nbankments etc.

The object of my invention is to provide a simple, convenient and easilyadjusted device of the kind described which when once set may bedepended upon to sustain the load.

To this end my invention consists in the novel construction, arrangementand combination of parts herein shown and described and moreparticularly pointed out in the claims.

In the accompanying drawings wherein like or similar referencecharacters indicate like or corresponding parts:

Figure 1 is a side elevation of my device.

Fig. 2 is an enlarged elevation at substan tially right angles to thatshown in Fig. i.

Fig. 3 is an enlarged elevation of the device shown in Fig. 1.

Fig. 4c is a section taken sul'istautially on line 44 of Fig. 3.

Fig. 5 is a section taken substantially on line 5--5 of Fig. 2.

Fig. 6 is a section taken si'ibstantially on line 6-6 of Fig. 4:.

Fig. 7 is ,a section taken substantially on line 77 of Fig. 2. a

F 8 is a side elevation of the controlling mechanism with the severalparts shown in release position.

Figs. 9, 10 and 11 are each detailfclevations of slightly modified formsoi? bearing heads for my improved shore. W

My improvement comprises a pedestal l and a column 2 mounted upon thepedestal and adapted to move longitudinally thereof with means forrigidly locking the column in position and for adjusting its positionlongitudinally of thepodestal to control the ultimate length of theshore.

As shown the pedestal comprises a tubular body 3 having a base 1-rigidly secured to its lower end and adapted to engage or rest upon anobject or structure to support the pedestal in position. A cap or head 5is also provided upon the body 3 for engaging the column 2 to lock thesame in position when in service. As shown the head 5 comprises a sleeve6 rigidly secured to the upper end of the body part 3 (see Fig. 4:) witha projecting flange or shoulder 7 near its lower end and having acylindrical body or shaft 8 extending upward therefrom. A head 9 ismounted upon the sh aft 8 and adapted to move longitudinally thereof anda pair of dogs or clamps 10 are pivotally mounted as at 11 on the head 9substantially opposite each other so as to engage the opposite sides ofthe column 2 to lock the column 2 against downward movement inthepedestal.

In the lfiffiilfilli'ctl term the :iaces 12 oi": the dogs 10 adjacentthe column 2 are serrated, as shown, to provide a more secure engagementwith the column and are each preferably formed to substantially lit theexterior of the column so as to prevent the formation oil localimloutations or crushing the column when in service. Suitableprojections 14 are also provided on each of the dogs 10 near its pivotalconnection with the head. adapted to serve as convenient means formanually operating the dogs; a suitably formed wrench or otherconvenient means being preferably n'ovided to engage the projections fordisengaging or otherwise operz'iting the dogs. Obviouslywhen. my shoreis in service supporting considerable weight it is diillicult todisengage thedogs without first slightly raising the column or loweringthe head 9 to permit the necessary upward movement oi? the free ends ofthe dogs.

In the preferred construction a plurality oi dentals 15 are provided atthe lower side oi the head 5), the space between the dentals beingpreferably slightly wider than each dentalv and a collar .16 is n-ovidedupon the body 8 below the head 9 ada iited to rest upon the shoulder 7with its upper edge provided with dentals 17' corresponding to thedentals 15 upon the head 5.) so that when in service the dentals 15 maycof-iperate with the dentals 1.7 to support the head 9 in position butwhen desired the collar 16 may be rotated sufficiently to bring thedcntals 17 into the spaces between the dentals 15 thus permitting thehead to slide downward upon the body 8 to facilitate the release of thedogs 10.

In the preferred construction the cooperating faces of the dentals 15and 17 are inclined slightly as shown in Figs. 2, 3 and 8 so that a veryslight movement of the collar 16 will relieve the pressure on thecooperating faces of the dentals thus permitting the collar to beconveniently moved as de scribed.

In the preferred construction suitable means are also provided torigidly lock the head and collar together to maintain the head inoperating position. In the form shown a pair of projecting lugs 18 areprovided at each side of the collar 16 and a pivotally mounted latch 19is attached to a rib 20 upon the head and adapted to normally hang withits free end between the lugs 18 thus bringing the dentals 17 intoposition to engage the ends of the dentals 15 to support the head 9 inposition and preventing rotation between the collar and head.

When it is desired to lower the head as described the projectingends 21ot the latches may be engaged to swing the free ends of the latchesoutward sufiiciently to clear the lugs 18 thus releasing the collarand'perrnitting its rotation as hereinbefore described. Any suitablemeans may be provided for adjusting the position of the col umn 2 uponthe pedestal. As shown the head 9 is provided with a projecting at eachside. The margin ofthe rib er upward slightly to afford a secure ti mentfor a bar and a pair of levers are provided each having a projecting tipor finger 24 at one end adapted to engage the part 22. A link 25 ispivotally connected to the lever 23 near the finger 2e and an open clamp26 is pivotally connected to the free end of the link 25; the engagingfaces of the clamp 26 being formed to cramp upon the column 2 to rigidlylock the clamp in position so that by manipulating the ever, the column2' may be successively raised; that is, when the free end of the lever23 is raised the clamp 26 will engage the column to force the sameupward and when the free end of the lever 23 is lowered the clamp 26will merely slide downward on the column and engage the same at thefirst upward movement of the lever.

The column 2 is preferably tubular member of substantially uniform sizethroughout its length with a suitable hearing head at its upper endadapted to engage the object being supported. In the form shown thebearing head comprises a suitably formed cap 27 rigidly secured to theupper end of the column and provided with a spherical projection or knob28 at its center and a cap 29 is also provided having a suitably termedbearing taco at its top or upper side which may, if desired be providedwith projecting pins or calks 34) for engaging a timber or othercompressible surface to prevent the head l'rom slipping in service acentral recess is also formed in the cap 29 adapted to receive the knob28. and finger 31 or other suitable means are provided at the margin oithe. recess adapted to be bent inward around the knob to retain the capin position thus providing a head having a bearing tace adapted toadjust itself to any irregularities or inequalities in the bearingsurtaces to which it is applied.

In Figs. 9. 10 and 11 I have shown other forms of bearing heads adaptedfor use with my improved shore. in Fig. 9 the cap 213 is provided withsuitable jaws 2H; l'or engaging a timber. In Fig. 10 a somewhat similarform is provided with jaws 36 arranged to engage a joist or plank tosupport the same edgewise while in Fig. 11. the head is ertended lateally in a form adapted to support the ends of two abutting timbers orjoists. Qbviously in many cases it is desired to provide bearing headssimilar to 27, ii 35 or 37 in place of the base i as shown but theoperation and constriuction of my device would not be altered by such anarrangement it being obvious that hearing heads and bases ot any desiredtorn] suitable to the material to be supported or to its form or otherpeculiarities oi the situation may be provided without departing fromthe spirit 0i invention, hence I do not wish to be understood aslimiting myself to the exact form or construction shown.

What I claim as new and desire to secure by Letters Patent is:

1. An adjustable support comprising a pedestal a. column mounted uponsaid pedcstal and adapted to move longitudinally thereof a partadjustable longitudinally of said pedestal a collar rotatably mountedupon said pedestal adjacent said part for controlling the position ofsaid part, means for locking said collar against rotation upon saidpedestal and a pair oi. dogs mounted upon said. part adapted to engagesaid column to control the longitudinal position of the colnmn upon thepedcstah in combination with means .ior adjusting the longitudinalposition of said column upon the pedestal.

2. An adjustable support comprising a pedestal, a column mounted uponsaid pedestal and adapted to move longitiulinal y thereof, a partattached to and adjustable longitudinally of said pedestal, a collarrotatably mounted upon said pedestal adjacent said part, said part andcollar each having dentals upon their proximate taccs adapted tocotiperate to control the position of said part by the position of saidcolmeans for locking said collar against rotation upon said pedestal,and means mounted upon said part adapted to engage said column tocontrol the longitudinal position of the column upon the pedestal, incombination with means for adjusting the longitudinal position of saidcolumn upon the pedestal.

3. An adjustable support comprising a tubular pedestal, a columnslidably extending into said pedestal a part attached to,

' and adjustable longitudinally of said pedestal, and clamping meansmounted upon said part and adapted to engage said column to maintain thecolumn in adjusted position in the pedestal, in combination with columnclamping means for adjusting the longitudinal position of said column inthe pedestal.

4t. An adjustable support comprising a tubular pedestal, a columnslidably extending into said pedestal, a part attached to, andadjustable longitudinally of said pedestal, and clamping means carriedby and cooperating with said part and engaging said column to maintainthe column in adjusted position in the pedestal, in combination withcolumn clampingmeans for adjusting the .lengitudinal position of saidcolumn in the pedestal.

An adjustable support comprising a tubular pedestal, a column slidablyextending into said pedestal, a part adjustable longitudinally of saidpedestal, means upon the pedestal for controlling the position oi saidpart, and means mounted upon said partadapted to engage said column tomaintain the column in adjusted position in the pedestal, in combinationwith means for adjusting the longitudinal position of said column in thepedestal.

6. An adjustable support comprising a tubular pedestal, a columnslida-bly extending into said pedestal, a part adjustable longitudinallyof said pedestal, and a pair of dogs mounted upon said part adapted toengage said column to maintain the column it in adjusted position in thepedestal, in com bination with means for adjusting the longitudinalposition of said column upon the pedestal Y 7. An adjustable supportcomprising a tubular pedestal, a column slidably extending into saidpedestal, a part attached to, and adjustable longitudinally of saidpedestal, and means mounted upon said part adapted to automaticallyclampingly engage said column to maintain the column in adjustedposition in the pedestal, in combination with means for adjusting thelongitudinal position oi. said column upon the pedestal.

8. An adjustable support comprising a tubular pedestal, a columnslidably extending into said pedestal, a part attached to, and

adjustable longitudinally of said pedestal, and means mounted upon saidpart adapted to clampingly engage said column to maintain the column inadjusted position in the pedestal, in combination with means adapted toloosely engage said part and clampingly engage the column for adjustingthe longitudinal position of said column upon the pedestal.

9. An adjustable support comprising a tubular pedestal, a columnslidably extending into said pedestal, a part attached to, andadjustable longitudinally of said pedestal, means upon the pedestal forcontrolling the position of said part, and a pair of dogs mounted uponsaid part adapted to engage said column. to maintain the column in adjusted position in the pedestal, in combination with means for adjustingthe longitudinal 1position of said column upon the pedesta 4 10. Anadjustable support comprising a tubular pedestal, a column slidablyextending into said pedestal, a part attached to the upper portion of,and adjustable longitudinally of said pedestal, a collar rotatablymounted upon said pedestal adjacent said part and means mounted, uponsaid part adapted to engage said column to maintain the column inadjusted position, in combina tion with means for adjusting thelongitudinal. .position of said column in the pedestal.

11. An adjustable support comprising a tubular pedestal, a columnslidably extending into said pedestal, a part attached to the upperportion of, and adjustable longitudinally of said pedestal, a collarrotatably mounted upon said pedestal adjacent said part, said part andcollar each having dentals upon their proximate faces adapted tocoiiperate to control the position of said part by the position of saidcollar, and means mounted upon said part adapted to engage said. columnto maintain the column in adjusted position in the pedestal, incombination with means for adjusting the longitudi nal position oi saidcolumn in the pedestal.

12. An adjustable support comprising a tubular pedestal, a columnslidably extending into said pedestal, a part attached to, andadjustable longitudinally of: said pedestal, and a pair of dogspivotally mounted upon said part adapted to engage said column tomaintain the column in adjusted position, in combination with means foradjusting the longitudinal position of said column in the pedestal.

13. An adjustable support comprising a tubular pedestal, a columnslidably extending into said pedestal, a part attached. to, andadjustable longitudinally of said pedestal, means upon the pedestal forcontrolling the position of said part, and a pair of dogs cooperatingwith said part adapted to antornatioaiiy engage said column tomaintainthe column in adjusted position with relntionto said part, incombination with means for adjusting the longitudinal position of saidcolumn in the pedestal.

. In testimony whereof I have hereunto signed my name in the presence oftwo subscribing Witnesses.

CHARLES M. MATLKHAM. \Vitnesses BURTON U. HILLS, BLANCHE OHALMERS.

